feat(presets): add Kimi K3 to Kimi open-platform presets

Add kimi-k3 (1M context, 131K max output) to the Kimi provider preset
model lists for Codex, Hermes, OpenClaw, and OpenCode, appended after
kimi-k2.7-code so the catalog-first-row default backfill is unchanged.
The Kimi For Coding plan presets keep the kimi-for-coding endpoint
alias and are intentionally untouched.

src/config/codexProviderPresets.ts

@@ -583,6 +583,11 @@ requires_openai_auth = true`,
         displayName: "Kimi K2.7 Code",
         contextWindow: 262144,
       },
+      {
+        model: "kimi-k3",
+        displayName: "Kimi K3",
+        contextWindow: 1048576,
+      },
     ]),
     codexChatReasoning: {
       supportsThinking: true,